Tool attachment.



No. 756,197. PATENTED MAR. 29, 1904. A. JARVIS & W. H. LANE.

TOOL ATTACHMENT. APPLICATION FILED FEB. 7, 1903.

N0 MODEL.

INVEN ORJ' fiber? Lhi'iflb and I BY flZ/z'awflllane I 6 Atlanta]- Noam:

Patented March 29, 1904.

PATENT OFFICE.

ALBERT JARVIS AND WILLIAM H. LANE, OF BERKLEY, VIRGINIA.

TOOL ATTACHMENT.

sPEcIFIcATIoN forming part of Letters Patent No. 756,197,. dated March e9, 1904.

I Application filed February 7, 1903. Serial No. 142,369. (No model.)

To all whom, it may concern:

Be it known that we, ALBERT JARvIs and WILLIAM H. LANE, citizens of the United States, residing at Berkley, in the county of Norfolk and State of Virginia, have invented new and useful Improvements in Tool Attachments, of which the following is a speci: fication.

This invention relates to new and useful improvements in bit-holding attachments for braces; and its object is to provide a simple and durable device of this character by means of which a bit connected to said attachment may be revolved at a high speed during the revolution of the brace.

A further object is to so arrange the socket of this attachment as to hold the bit at a point adjacent to one edge of the attachment, whereby said bit may beheld close to a surface parallel therewith.

With the above and other objects in view the invention consists in providing a handle upon which is revolubly mounted a cap having teeth on its inner surface. tends from the center of this cap and is journaled at one end within the handle, while its opposite end is adapted to be detachably secured within the bit-holding socket of a brace"; A gear is arranged under the cap, and the teeth thereof are adapted to mesh with the teeth in the cap. This gear is secured to a short shaft journaled Within the handle and having a bit-socket at the lower end thereof.

The invention also consists in the further novel construction and combination of parts hereinafter more fully described and claimed, and illustrated in the accompanying drawings,

on line 3 3, Fig. 1.

Referring to the figures by numerals of reference, 1 is a block having a handle 2 extending therefrom, and jourrialed within the center ofthis block is a shaft 3, having an aperture therein, which extends through and is secured to the center of a cap 4. Depend- 5 ing centrally of and formed integral with the A shank ex-.

a small shaft.8, journaled within the outer end of block 1 ,and having an ordinary bitholding socket 9 secured to the lower end thereof. An angular" head 10 is provided at the upper end of the shaft 3, whereby the same may be readily secured within a bit-holding socket 11 of a brace 12 of ordinary construction, while the opposite end of said shaft is provided with any suitable means, as a nut 13, whereby accidental displacement thereof is prevented;

In operation the head 10 is placed within the socket 11 of brace 12, and a suitable bit is secured within the socket 9 of the attachment. The handle 2 is then grasped in one hand and handle 14 of the brace in the other. The brace 12 is then revolved by means of the handle 14, and as the block 1 is held stationary by vmeans of the handle 2 the gear 7 thereon will be rapidly revolved by the teeth within the cap 4:. Rotary motion is thus imparted to the bit secured within the socket 9. As shaft 8 is arranged close to the outer end of block 1, it is obvious that a bit within the socket can be brought close to a surface parallel therewith, thereby overcoming a great disadvantage which has heretofore been met with in high-speed attachments of this character. By arranging the. gear 7 within the cap 4 the teeth upon said cap and gear are protected from dust, &c., and a smoothly-running device is thus obtained. The device is extremely simple, light, and durable, and inexpensive in construction.

In the foregoing description We have shown the preferred form of our invention; but we do not limit ourselves thereto, as we are aware that modifications may be made therein without departing from the spirit or sacrificing the advantages thereof, and we therefore reserve ing a depending central sleeve integral therewith, said sleeve having apertures in alinement and being adapted to embrace the shaft, a key passing through the apertures in the sleeve and shaft, teeth upon the inner surface.

of the side of the cap thereof, said cap bearing upon the block, a shaft journaled within the block near the outer end thereof, a gear upon one end of the shaft and arranged under and eccentric to said cap, said gear being adapted to mesh with the teeth in the cap, and a socket secured to and revoluble with the shaft of said eccentric gear.

In testimony whereof we afiix our signatures in presence of two witnesses.

ALBERT JARVIS. WILLIAM H. LANE.

Witnesses:

J. F. HUTGHINGS, PHILIP DOZIER. 

